{"id":2000,"date":"2021-10-20T08:52:46","date_gmt":"2021-10-20T06:52:46","guid":{"rendered":"https:\/\/autochelu.ro\/blog\/?p=2000"},"modified":"2021-10-20T08:52:46","modified_gmt":"2021-10-20T06:52:46","slug":"procesul-de-acoperire-cu-pulberi","status":"publish","type":"post","link":"https:\/\/autochelu.ro\/blog\/procesul-de-acoperire-cu-pulberi\/","title":{"rendered":"Procesul de acoperire cu pulberi"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2001 size-full\" style=\"color: #dedede; font-family: 'Times New Roman', serif; font-size: medium;\" src=\"https:\/\/autochelu.ro\/blog\/wp-content\/uploads\/2021\/10\/acoperire-pulberi.jpg\" alt=\"\" width=\"1200\" height=\"800\" srcset=\"https:\/\/autochelu.ro\/blog\/wp-content\/uploads\/2021\/10\/acoperire-pulberi.jpg 1200w, https:\/\/autochelu.ro\/blog\/wp-content\/uploads\/2021\/10\/acoperire-pulberi-300x200.jpg 300w, https:\/\/autochelu.ro\/blog\/wp-content\/uploads\/2021\/10\/acoperire-pulberi-1024x683.jpg 1024w, https:\/\/autochelu.ro\/blog\/wp-content\/uploads\/2021\/10\/acoperire-pulberi-768x512.jpg 768w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p style=\"font-size: medium;\"><span style=\"color: #dedede;\">Acoperire cu pulberi<\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Acoperirea cu pulbere este un proces de finisare \u00een care materialul praf uscat, cu curgere liber\u0103, termoplastic sau termorezistent este aplicat pe o suprafa\u021b\u0103, topit \u0219i \u00eent\u0103rit \u00eentr-un strat uniform.\u00a0Procesul de finisare este potrivit pentru diverse materiale, inclusiv metale, materiale plastice, sticl\u0103 \u0219i pl\u0103ci din fibr\u0103 de densitate medie (MDF)\u00a0\u0219i poate oferi at\u00e2t acoperiri de suprafa\u021b\u0103 func\u021bionale, c\u00e2t \u0219i decorative \u00eentr-o gam\u0103 larg\u0103 de culori, finisaje \u0219i texturi care nu sunt u\u0219or de realizat de c\u0103tre metode conven\u021bionale de acoperire lichid\u0103.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Exist\u0103 dou\u0103 metode principale de acoperire cu pulbere &#8211; depunerea prin pulverizare electrostatic\u0103 (ESD) \u0219i aplicarea \u00een pat fluidizat. Oricare dintre procese poate produce un finisaj uniform, dur, care este \u00een general mai durabil, mai rentabil \u0219i mai ecologic dec\u00e2t un strat de vopsea lichid\u0103. Cu toate acestea, \u00een timp ce acoperirile cu pulbere demonstreaz\u0103 unele avantaje fa\u021b\u0103 de acoperirile lichide, \u00een special \u00een aplica\u021biile de acoperire cu trafic gros sau mare, acestea nu sunt potrivite pentru toate aplica\u021biile de fabrica\u021bie. Cerin\u021bele \u0219i specifica\u021biile cerute de o anumit\u0103 aplica\u021bie de acoperire cu pulberi, de exemplu, mediul de aplicare, materialele de substrat, dimensionarea, costurile, timpii de execu\u021bie, ajut\u0103 la determinarea tipului de proces de acoperire cel mai potrivit pentru utilizare.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">De\u0219i fiecare proces de acoperire are avantajele \u0219i dezavantajele sale, acest articol se concentreaz\u0103 pe acoperirea cu pulbere, prezent\u00e2nd elementele de baz\u0103 ale procesului de acoperire cu pulberi, componentele \u0219i mecanica necesar\u0103 a sistemului. \u00cen plus, articolul exploreaz\u0103 avantajele \u0219i limit\u0103rile procesului de acoperire cu pulberi \u0219i ofer\u0103 c\u00e2teva dintre considera\u021biile pe care clie\u021bii trebuie s\u0103 le aib\u0103 \u00een vedere atunci c\u00e2nd aleg un furnizor de servicii de acoperire cu pulberi.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #00334d;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><b>Procesul de acoperire cu pulberi<\/b><\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Acoperirea cu pulbere este un proces de finisare a suprafe\u021bei \u00een mai multe etape adecvat pentru substraturi metalice \u0219i nemetalice.\u00a0Metoda include o preparare, aplicare \u0219i etapa de\u00a0\u00eent\u0103rire, \u0219i, cel pu\u021bin, utilizeaz\u0103 un pistol de pulverizare, pulverizarea se face \u00een cabin\u0103 \u0219i \u00eent\u0103rirea \u00een cuptor de uscare.\u00a0<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Pentru ca procesul de acoperire s\u0103 func\u021bioneze f\u0103r\u0103 probleme \u0219i la o capacitate optim\u0103, produc\u0103torii \u0219i furnizorii de servicii de finisare ar trebui s\u0103 ia \u00een considerare mai mul\u021bi factori, cum ar fi materialul de substrat care este acoperit \u0219i propriet\u0103\u021bile acestuia, precum \u0219i tipul de material de acoperire cu pulberi utilizat.\u00a0<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #00334d;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Prezentare general\u0103 a proceselor \u0219i echipamentelor<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Spre deosebire de procesul de acoperire lichid\u0103 care utilizeaz\u0103 o suspensie de acoperire lichid\u0103, acoperirea cu pulbere este un proces de finisare uscat\u0103 care folose\u0219te material de acoperire pulverulent. \u00cen timpul procesului de acoperire cu pulberi, pulberea este aplicat\u0103 pe suprafa\u021ba pretratat\u0103 a unui substrat, topit\u0103 \u0219i apoi uscat\u0103 \u0219i \u00eent\u0103rit\u0103 \u00eentr-un strat protector sau decorativ. Acest proces are trei etape: preg\u0103tirea suprafe\u021bei, aplicarea acoperirii \u0219i \u00eent\u0103rirea la c\u0103ldur\u0103. Fiecare etap\u0103 folose\u0219te un set de materiale \u0219i echipamente care indic\u0103 particularit\u0103\u021bile sale (de exemplu, etapa de \u00eent\u0103rire folose\u0219te un cuptor de \u00eent\u0103rire) \u0219i, atunci c\u00e2nd este finalizat\u0103 corect, contribuie la producerea unui finisaj durabil \u0219i uniform al suprafe\u021bei.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><b>Etapa de preg\u0103tire:<\/b><\/span><\/span><\/span><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">\u00a0\u00cenainte de aplicarea oric\u0103rui material de acoperire cu pulbere, suprafa\u021ba substratului trebuie cur\u0103\u021bat\u0103 \u0219i tratat\u0103 pentru a se asigura c\u0103 piesa nu con\u021bine praf, murd\u0103rie \u0219i resturi.\u00a0Dac\u0103 o suprafa\u021b\u0103 nu este suficient de preg\u0103tit\u0103, orice reziduri r\u0103mase ar putea afecta aderen\u021ba pulberii \u0219i calitatea finisajului final.\u00a0Un tratament complet de preparare depinde \u00een principal de materialul acoperit.\u00a0Cu toate acestea, unii dintre pa\u0219ii care sunt folosi\u021bi \u00een mod obi\u0219nuit \u00een aceast\u0103 etap\u0103 includ cur\u0103\u021barea, cl\u0103tirea, gravarea, sablarea \u0219i uscarea, iar echipamentele cele mai utilizate includ sta\u021bii de sp\u0103lare, camere de sablare, cabin\u0103 vopsire \u0219i cuptoare de uscare.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Uleiul, gr\u0103simea, solventul \u0219i rezidurile pot fi \u00eendep\u0103rtate de pe suprafa\u021ba piesei cu detergen\u021bi alcalini slabi \u0219i neutri \u00een rezervoarele de baie sau cu sta\u021bii de sp\u0103lare.\u00a0Sta\u021biile de sp\u0103lare sunt capabile s\u0103 stropeasc\u0103 p\u0103r\u021bile cu ap\u0103 fierbinte, abur, detergent \u0219i alte solu\u021bii de pretratare pentru a cur\u0103\u021ba, preg\u0103ti chimic \u0219i cl\u0103ti suprafa\u021ba \u00eenainte de acoperire.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">P\u0103r\u021bile care au resturi pe suprafa\u021b\u0103, de exemplu, rugin\u0103, vopsea sau finis\u0103ri existente vor necesita \u00een general utilizarea unei camere de sablare.\u00a0O camer\u0103 de sablare este o incint\u0103 care folose\u0219te fluid sub presiune, de obicei aer comprimat, pentru a propulsa material abraziv, cum ar fi nisip pe o suprafa\u021b\u0103 metalic\u0103.\u00a0Materialul abraziv propulsat \u00eendep\u0103rteaz\u0103 resturile de pe suprafa\u021b\u0103, cre\u00e2nd o textur\u0103 \u0219i o suprafa\u021b\u0103 mai curat\u0103 \u0219i mai neted\u0103 pe care s\u0103 se aplice materialul de acoperire.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Unele aplica\u021bii de acoperire cu pulbere utilizeaz\u0103 un cuptor uscat.\u00a0Similar cuptorului utilizat \u00een etapa de \u00eent\u0103rire, cuptorul de uscare evapor\u0103 apa r\u0103mas\u0103 sau solu\u021biile din piesele sp\u0103late sau cl\u0103tite, \u00eenc\u0103lze\u0219te piesele la o temperatur\u0103 optim\u0103 pentru etapa de aplicare a acoperirii.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Dac\u0103 proiectarea componentelor necesit\u0103 ca anumite sec\u021biuni s\u0103 r\u0103m\u00e2n\u0103 neacoperite, produsele de mascare se aplic\u0103 pe suport \u00eenainte de etapa de aplicare.\u00a0Aceste produse sunt disponibile \u00eentr-o varietate de forme standardizate \u0219i personalizate.\u00a0Cu toate acestea, \u00een general, acestea sunt construite din h\u00e2rtie sau folie de plastic acoperit\u0103 cu un adeziv sensibil la presiune, care le permite s\u0103 adere la substrat \u0219i s\u0103 protejeze zona acoperit\u0103 de contactul cu materialul pulbere \u00een timpul opera\u021biunilor de acoperire cu pulbere.<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><b>Etapa de aplicare:<\/b><\/span><\/span><\/span><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">\u00a0Exist\u0103 dou\u0103 tipuri de materiale de acoperire cu pulbere care pot fi aplicate.\u00a0Tipul de material de acoperire utilizat \u00eentr-o aplica\u021bie de acoperire, \u00een parte, determin\u0103 metoda de aplicare.\u00a0Exist\u0103 dou\u0103 metode principale de acoperire cu pulbere utilizate de produc\u0103tori \u0219i furnizorii de servicii de finisare, depunerea electrostatic\u0103 (ESD) \u0219i acoperirea cu pulbere \u00een pat fluidizat.<\/span><\/span><\/span><\/p>\n<ul>\n<li><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Depunerea electrostatic\u0103 (ESD): Pentru majoritatea p\u0103r\u021bilor metalice acoperite cu pulbere, materialul de acoperire este aplicat prin pulverizare electrostatic\u0103.\u00a0Aceast\u0103 metod\u0103 de aplicare folose\u0219te o cabin\u0103 de pulverizare cu pulbere, un alimentator de pulbere, pistol de pulverizare electrostatic \u0219i, \u00een func\u021bie de tipul de pistol utilizat, o unitate de alimentare.\n<p>Cabina de pulverizare serve\u0219te ca zon\u0103 de lucru pentru aplicarea materialului sub form\u0103 de pulbere pe o pies\u0103 \u0219i poate ac\u021biona, de asemenea, cu un filtru de aer \u0219i un sistem de re\u021binere \u0219i recuperare a suprapulveriz\u0103rii pulberii.\u00a0Materialul praf fluidizat este distribuit de la unitatea de alimentare la pistolul de pulverizare, care este utilizat at\u00e2t pentru a transmite o \u00eenc\u0103rcare electric\u0103 asupra pulberii, c\u00e2t \u0219i pentru a o aplica pe substrat.\u00a0Exist\u0103 trei tipuri de pistoale electrostatice utilizate \u00een mod obi\u0219nuit Corona, Tribo \u0219i Bell.\u00a0Atunci c\u00e2nd utiliza\u021bi un pistol de pulverizare Corona pentru a aplica acoperiri cu pulbere, materialul de pulbere trece prin partea din fa\u021b\u0103 a pistolului, un electrod de \u00eenc\u0103rcare alimentat de o unitate de alimentare confer\u0103 o sarcin\u0103 de c\u00e2mp electrostatic particulelor pulberii.\u00a0Cu pistolul Tribo, sarcina este generat\u0103 de pulberea care trece printr-un material diferit, cum ar fi \u021beava pistolului, iar cu pistolul Bell,\u00a0materialul pulbere este \u00eenc\u0103rcat at\u00e2t prin conduc\u021bie, c\u00e2t \u0219i prin desc\u0103rcarea coroanei, deoarece este aruncat din clopotul pistolului.\u00a0\u00cen orice caz, particulele \u00eenc\u0103rcate electric pot apoi s\u0103 adere la suprafa\u021ba \u00eemp\u0103m\u00e2ntat\u0103 electric a piesei \u0219i vor r\u0103m\u00e2ne aderente at\u00e2ta timp c\u00e2t \u00ee\u0219i men\u021bin o parte din sarcin\u0103.\u00a0Orice material de pulverizare excesiv\u0103 poate fi colectat de c\u0103tre sisteme de rcuperare\u00a0\u0219i reutilizate \u00een aplica\u021bii de acoperire viitoare.<\/span><\/span><\/span><\/li>\n<\/ul>\n<ul>\n<li><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Acoperire cu pulbere de pat fluidizat<\/span><\/span><\/span><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">: Spre deosebire de ESD, unde materialul de acoperire cu pulbere este pulverizat electrostatic \u0219i aderat pe o suprafa\u021b\u0103, \u00een acoperirea cu pulbere de pat fluidizat, piesele pre\u00eenc\u0103lzite sunt \u00een schimb scufundate \u00een materialul de pulbere \u00eentr-un pat fluidizat.\u00a0Exist\u0103 o op\u021biune alternativ\u0103 numit\u0103 acoperire cu pulbere de pat fluidizat electrostatic care genereaz\u0103 un nor de particule de pulbere \u00eenc\u0103rcate electric deasupra patului fluidizat prin care o parte este trecut\u0103 pentru a fi acoperit\u0103.<\/span><\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><b>Acoperire cu pulberi &#8211; Etapa de \u00eent\u0103rire:<\/b><\/span><\/span><\/span><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">\u00a0Particularit\u0103\u021bile \u0219i caracteristicile etapei de \u00eent\u0103rire a procesului de acoperire cu pulbere sunt determinate \u00een principal de metoda \u00een care se aplic\u0103 acoperirea cu pulbere, precum \u0219i de tipul de material de acoperire cu pulbere utilizat.<\/span><\/span><\/span><\/p>\n<ul>\n<li><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">P\u0103r\u021bile care sunt acoperite cu pulbere prin depunere electrostatic\u0103 trebuie s\u0103 fie \u00eent\u0103rite \u00eentr-un cuptor de \u00eent\u0103rire cu pulbere.\u00a0\u00cen timp ce programul de \u00eent\u0103rire, temperatura \u0219i timpul pe care trebuie s\u0103 le suporte o acoperire cu pulbere \u00eentr-un cuptor de \u00eent\u0103rire pentru a ob\u021bine o \u00eent\u0103rire complet\u0103, pentru o pies\u0103 acoperit\u0103 cu pulbere depinde \u00een mare parte de dimensiunea, forma \u0219i grosimea acesteia, \u00een general, un cuptor de uscare func\u021bioneaz\u0103 \u00eentre 160 &#8211; 230\u00b0 Celsius \u0219i va avea ca rezultat timpi de uscare care variaz\u0103 \u00eentre zece minute \u0219i peste o or\u0103.\u00a0\u00cen consecin\u021b\u0103, piesele mai mici acoperite cu pulbere necesit\u0103 mai pu\u021bin timp de \u00eent\u0103rire \u0219i volume mai mici de aer \u00eenc\u0103lzit pentru a se usca complet, iar piesele mai mari necesit\u0103 mai mult.\u00a0Pe m\u0103sur\u0103 ce piesa acoperit\u0103 cu depunere electrostatic\u0103 atinge temperatura optim\u0103 de \u00eent\u0103rire \u00een cuptor, particulele de pulbere se topesc \u0219i curg \u00eempreun\u0103 pentru a forma o pelicul\u0103 continu\u0103 pe suprafa\u021ba piesei.<\/span><\/span><\/span><\/li>\n<li><span style=\"color: #212529;\"><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Pentru piesele acoperite cu pulbere \u00eentr-un pat fluidizat, piesele sunt \u00eenc\u0103lzite \u00eenainte de etapa de aplicare a acoperirii \u00een cuptoare similare celor utilizate pentru uscarea pieselor acoperite cu ESD.\u00a0Pe m\u0103sur\u0103 ce partea pre\u00eenc\u0103lzit\u0103 este scufundat\u0103 \u00een materialul de acoperire, particulele de pulbere se topesc \u0219i curg \u00eempreun\u0103 la contactul cu suprafa\u021ba \u00eenc\u0103lzit\u0103 a piesei.\u00a0P\u0103r\u021bile care sunt acoperite prin acoperire cu pulbere de pat fluidizat electrostatic pot fi fie pre\u00eenc\u0103lzite \u00eenainte de a fi trecute prin pulverizarea de acoperire cu pulbere, caz \u00een care acoperirea cu pulbere format\u0103 ar fi la cele produse prin metoda obi\u0219nuit\u0103 cu pat fluidizat, fie piesa poate fi \u00eenc\u0103lzit\u0103 \u0219i uscat\u0103 \u00eentr-un cuptor de \u00eent\u0103rire dup\u0103 ce a fost acoperit, ca \u0219i cu acoperiri produse prin metoda de acoperire ESD.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">C\u00e2nd este aplicat pentru prima dat\u0103 pe un substrat, materialul de acoperire termoizolant cu pulbere are molecule scurte de polimer.\u00a0Cu toate acestea, \u00een timpul procesului de \u00eent\u0103rire, pulberea sufer\u0103 o reac\u021bie de reticulare chimic\u0103 ireversibil\u0103, care leag\u0103 lan\u021buri lungi de molecule de polimer.\u00a0Aceast\u0103 reac\u021bie schimb\u0103 propriet\u0103\u021bile fizice \u0219i chimia materialului \u0219i \u00eei permite s\u0103 se \u00eent\u0103reasc\u0103 \u00eentr-un finisaj sub\u021bire, uniform \u0219i dur, dac\u0103 se respect\u0103 programul de uscare adecvat.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Acoperirile cu pulbere termoplastic\u0103 nu necesit\u0103 un ciclu de uscare.\u00a0\u00cen schimb, materialul termoplastic necesit\u0103 doar timpul \u0219i temperatura necesare pentru a se topi, a curge \u0219i a crea un strat final.\u00a0Spre deosebire de materialele termorezistente care sufer\u0103 o reac\u021bie chimic\u0103 \u00een timpul etapei de \u00eent\u0103rire, materialele termoplastice nu \u00ee\u0219i schimb\u0103 propriet\u0103\u021bile fizice sau chimice atunci c\u00e2nd se aplic\u0103 c\u0103ldur\u0103.\u00a0Prin urmare, pot fi retopite, reformate \u0219i reciclate pentru aplica\u021bii de acoperire viitoare.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">C\u00e2teva aspecte care trebuie luate \u00een considerare atunci c\u00e2nd alege\u021bi \u00eentre termorezistent \u0219i termoplastic materialul de acoperire este metoda de aplicare \u0219i aplica\u021bia prev\u0103zut\u0103 pentru acoperire.\u00a0\u00cen general, pulberile termorezistente se aplic\u0103 numai prin metoda ESD.\u00a0Aceast\u0103 limitare exist\u0103 deoarece scufundarea pieselor pre\u00eenc\u0103lzite \u00een pulbere termorezistent\u0103 poate provoca legarea \u00eencruci\u0219at\u0103 a excesului de pulbere datorit\u0103 c\u0103ldurii acumulate \u0219i reziduale \u00een patul fluid.\u00a0Deoarece reac\u021bia de reticulare determin\u0103 modific\u0103ri permanente ale materialului sub form\u0103 de pulbere, astfel de evenimente ar duce la de\u0219euri excesive de material de acoperire.\u00a0Procesul de \u00eent\u0103rire permite termorezisten\u021belor s\u0103 ob\u021bin\u0103 acoperiri mai dure dec\u00e2t termoplastice, permi\u021b\u00e2ndu-le astfel s\u0103 reziste la temperaturi mai ridicate \u0219i s\u0103 demonstreze o rezisten\u021b\u0103 mai mare la zg\u00e2rieturi \u0219i rezisten\u021b\u0103.\u00a0Cu toate acestea, finisajul mai dur poate limita rezisten\u021ba la impact a acoperirilor termorezistente, iar supra\u00eent\u0103rirea poate face ca acoperirea s\u0103 devin\u0103 fragil\u0103, \u00een special \u00een acoperirile mai groase.\u00a0Pulberea termoplastic\u0103 poate fi aplicat\u0103 at\u00e2t prin metoda ESD, c\u00e2t \u0219i prin metoda de acoperire cu pat fluidizat \u0219i, \u00een general, poate produce acoperiri mai groase, mai flexibile \u0219i mai rezistente la impact dec\u00e2t pulberea termorezistent\u0103.\u00a0De\u0219i capacitatea de a fi retopit\u0103 ofer\u0103 un anumit avantaj \u00een ceea ce prive\u0219te costurile materialului, face acoperirile cu pulbere termoplastic\u0103 mai pu\u021bin potrivite pentru aplica\u021bii cu c\u0103ldur\u0103 ridicat\u0103 \u0219i intens\u0103, deoarece materialul de acoperire se poate \u00eenmuia sau topi. \u00a0<\/span><\/span><\/span><\/li>\n<li>\n<h3 class=\"western\"><span style=\"color: #00334d;\"><span style=\"font-size: medium;\">Considera\u021bii privind materialul substratului<\/span><\/span><\/h3>\n<\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Acoperirile cu pulbere se aplic\u0103 \u00een principal pe substraturi metalice, cum ar fi o\u021belul, o\u021belul inoxidabil \u0219i aluminiul.\u00a0Cu toate acestea, ele pot fi aplicate \u0219i pe substraturi nemetalice, cum ar fi sticl\u0103, lemn sau pl\u0103ci de fibr\u0103 cu densitate medie (MDF).\u00a0Gama de materiale adecvate pentru procesul de acoperire cu pulbere este limitat\u0103 la materiale care pot rezista la temperaturile necesare pentru topirea \u0219i vindecarea materialului de acoperire a pulberii f\u0103r\u0103 a se topi, deforma sau arde.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Materialul ales ajut\u0103 la determinarea metodei de acoperire folosit\u0103.\u00a0Deoarece metalele pot fi \u00eemp\u0103m\u00e2ntate electric, materialul de acoperire se aplic\u0103 \u00een general pe substraturi metalice prin metoda de depunere prin pulverizare electrostatic\u0103, dar pot fi aplicate \u0219i prin metoda patului fluidizat.\u00a0Pe de alt\u0103 parte, \u00eentruc\u00e2t nemetalele nu pot fi suficient \u00eemp\u0103m\u00e2ntate, acestea necesit\u0103 aplicarea straturilor de pulbere prin metoda de acoperire cu pulbere \u00een pat fluidizat.<\/span><\/span><\/span><\/li>\n<li>\n<h2 class=\"western\"><span style=\"font-size: medium;\">Finisaje \u0219i capacit\u0103\u021bi de acoperire cu pulbere<\/span><\/h2>\n<\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\">Exemple de acoperiri pulverulente colorate pe piesele arcului.<\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Acoperirile cu pulbere pot fi aplicate \u00eentr-o gam\u0103 larg\u0103 de culori, finisaje, texturi \u0219i grosimi care nu sunt u\u0219or de realizat prin metode conven\u021bionale de acoperire lichid\u0103.\u00a0Capabile s\u0103 fie fabricate practic \u00een orice culoare, materialele de acoperire cu pulbere pot fi formulate at\u00e2t pentru aplica\u021bii de protec\u021bie, c\u00e2t \u0219i pentru aplica\u021bii decorative.\u00a0Finisajul final realizat de materialul sub form\u0103 de pulbere variaz\u0103 de la mat la lucios \u0219i clar p\u00e2n\u0103 la sclipitor sau metalic.\u00a0Sunt disponibile \u0219i diverse texturi \u00een scopuri decorative sau pentru ascunderea imperfec\u021biunilor suprafe\u021bei. \u00a0<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Procesul de acoperire cu pulbere permite o gam\u0103 mai larg\u0103 de grosimi de acoperire.\u00a0Comparativ cu procesul de acoperire lichid\u0103, acoperirea cu pulbere poate produce mai u\u0219or acoperiri mai groase, uniforme, mai ales atunci c\u00e2nd se utilizeaz\u0103 metoda de acoperire cu pat fluidizat.\u00a0Folosind metoda ESD, este posibil s\u0103 se realizeze acoperiri sub\u021biri \u0219i uniforme,\u00a0de\u0219i, nu la fel de sub\u021bire ca acoperirile realizate prin procesul de acoperire lichid\u0103.<\/span><\/span><\/span><\/li>\n<li>\n<h2 class=\"western\"><span style=\"font-size: medium;\">Avantajele acoperirii cu pulbere<\/span><\/h2>\n<\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Procesul de acoperire cu pulbere ofer\u0103 mai multe avantaje\u00a0fa\u021b\u0103 de metodele conven\u021bionale de acoperire cu lichid, inclusiv durabilitate crescut\u0103, capacit\u0103\u021bi pentru finisaje mai specializate, impact mai mic asupra mediului, timp de livrare mai rapid \u0219i costuri mai mici ale materialului.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Pe l\u00e2ng\u0103 faptul c\u0103 sunt disponibile cu o gam\u0103 larg\u0103 de op\u021biuni de finisare, acoperirile cu pulbere sunt mai durabile dec\u00e2t acoperirile lichide.\u00a0Ele demonstreaz\u0103 o rezisten\u021b\u0103 mai mare la impact, umezeal\u0103, substan\u021be chimice \u0219i uzur\u0103 \u0219i ofer\u0103 o protec\u021bie mai mare \u00eempotriva zg\u00e2rieturilor, abraziunii, coroziunii, decolor\u0103rii \u0219i uzurii generale.\u00a0Aceste caracteristici le fac potrivite pentru aplica\u021bii cu utilizare ridicat\u0103 \u0219i trafic intens.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Un alt avantaj al procesului de acoperire cu pulbere este lipsa emisiilor de solven\u021bi \u0219i dioxid de carbon, a de\u0219eurilor periculoase care necesit\u0103 eliminare \u0219i a cerin\u021belor de grund de suprafa\u021b\u0103.\u00a0Aceste excluderi limiteaz\u0103 cantitatea de substan\u021be toxice \u0219i cancerigene care sunt eliberate \u00een mediu pe tot parcursul procesului \u0219i contribuie la recunoa\u0219terea acoperirii cu pulbere ca o alternativ\u0103 mai ecologic\u0103 la acoperirile lichide.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Procesul de acoperire cu pulberi poate avea costuri pe termen lung mult mai mici comparativ cu procesul de acoperire lichid\u0103, datorit\u0103 faptului c\u0103 are o schimbare \u00een general mai rapid\u0103 \u0219i o utilizare mai mare a materialului de acoperire. Deoarece etapa de \u00eent\u0103rire a acoperirii cu pulbere permite asamblarea, ambalarea \u0219i livrarea pieselor acoperite cu pulbere imediat dup\u0103 r\u0103cirea piesei, piesele petrec mai pu\u021bin timp \u00een inventar, ceea ce permite produc\u0103torilor \u0219i furnizorilor de servicii de finisare s\u0103 aib\u0103 o livrare c\u0103tre client mai rapid\u0103 \u0219i mai pu\u021bin spa\u021biu de stocare. Procesul de acoperire cu pulbere permite colectarea \u0219i reciclarea materialului de pulverizare excesiv\u0103 \u00een loc de risipire, ceea ce scade cantitatea de de\u0219euri care necesit\u0103 eliminare, cre\u0219te rata de utilizare a materialului de acoperire \u0219i reduce costul materialelor \u00een timp.<\/span><\/span><\/span><\/li>\n<li>\n<h2 class=\"western\"><span style=\"font-size: medium;\">Limit\u0103ri ale acoperirii cu pulbere<\/span><\/h2>\n<\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">De\u0219i procesul de acoperire cu pulberi ofer\u0103 mai multe avantaje importante fa\u021b\u0103 de acoperirea cu lichid, exist\u0103 \u0219i limit\u0103ri ale procesului. Limit\u0103rile acoperirii cu pulbere includ o gam\u0103 restr\u00e2ns\u0103 de materiale de substrat adecvate, dificult\u0103\u021bi \u00een producerea de acoperiri uniforme, sub\u021biri, timpi de livrare mai lungi pentru \u00eenveli\u0219urile de schimbare a culorii, timpi mai lungi de uscare \u0219i \u00eent\u0103rire pentru piese mari \u0219i costuri mai mari de pornire.<\/span><\/span><\/span><\/li>\n<li><a name=\"Bookmark\"><\/a> <span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">Materialele de substrat trebuie s\u0103 fie capabile s\u0103 reziste la cerin\u021bele de temperatur\u0103 ale etapei de \u00eent\u0103rire pentru a fi potrivite pentru aplica\u021bii de acoperire cu pulbere.\u00a0Chiar dac\u0103 un material poate rezista la c\u0103ldur\u0103, realizarea unei acoperiri uniforme se poate dovedi problematic\u0103, \u00een special pentru acoperirile sub\u021biri sau multicolore.\u00a0Acoperirile sub\u021biri sunt dificil de produs, deoarece este dificil s\u0103 se controleze cantitatea de material pulbere care se aplic\u0103 pe substrat \u00een timpul etapei de aplicare, asigur\u00e2nd \u00een acela\u0219i timp o acoperire uniform\u0103.\u00a0\u00cenveli\u0219urile multicolore sunt dificil de produs rapid, deoarece orice pulverizare excesiv\u0103 trebuie str\u00e2ns\u0103 \u0219i cur\u0103\u021bat\u0103 din zona de pulverizare \u00eentre schimb\u0103rile de culoare,\u00a0\u00een caz contrar, poate provoca contaminarea \u00eencruci\u0219at\u0103 a materialelor reciclate sau refolosite.<\/span><\/span><\/span><\/li>\n<li><span style=\"font-family: Times New Roman, serif;\"><span style=\"font-size: medium;\"><span style=\"color: #212529;\">\u00cen timp ce procesul de acoperire cu pulberi poate avea costuri mai mici \u00een timp, pentru aplica\u021bii specifice de acoperire, poate fi mai rentabil s\u0103 folosi\u021bi acoperiri lichide. De exemplu, \u00een timp ce piesele acoperite cu pulbere au \u00een mod obi\u0219nuit o uscare mai rapid\u0103, piesele mari, groase sau grele tind s\u0103 necesite temperaturi mai ridicate \u0219i timpi de \u00eent\u0103rire \u0219i uscare mai extinse.<\/span><\/span><\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Acoperirea cu pulbere este un proces de finisare \u00een care materialul praf uscat, cu curgere liber\u0103, termoplastic sau termorezistent este aplicat pe o suprafa\u021b\u0103, topit \u0219i \u00eent\u0103rit \u00eentr-un strat uniform.\u00a0Procesul de finisare este potrivit pentru diverse materiale, inclusiv metale, materiale plastice, sticl\u0103 \u0219i pl\u0103ci din fibr\u0103 de densitate medie (MDF)\u00a0\u0219i poate oferi at\u00e2t acoperiri de suprafa\u021b\u0103 func\u021bionale, c\u00e2t \u0219i decorative \u00eentr-o gam\u0103 larg\u0103 de culori, finisaje \u0219i texturi care nu sunt u\u0219or de realizat de c\u0103tre metode conven\u021bionale de acoperire lichid\u0103.<\/p>\n","protected":false},"author":1,"featured_media":2001,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[37],"tags":[],"class_list":["post-2000","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-jante"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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